Port 1532 lives two lives. Officially, it belongs to miroconnect—a modem manufactured by Miro Computer Products in the 1990s.1 In practice, you'll find Oracle Enterprise Manager Agent listening here instead.2
This is the registered ports range working as intended: assignments are made, but they're not enforced. When the original service fades into obsolescence, the port number becomes available for reuse—officially or not.
What the Port Was Registered For
The Internet Assigned Numbers Authority (IANA) lists port 1532 as assigned to "miroconnect" for both TCP and UDP, with Michael Fischer as the contact.3 The MiroCONNECT 34Wave was a modem card from the 1990s, back when modems were add-in cards with drivers for Windows 95.4
That hardware is gone. The registration remains.
What Actually Uses Port 1532 Today
Oracle Enterprise Manager Agent—the monitoring component that runs on database servers and reports back to Oracle Management Service (OMS)—commonly uses port 1532.2 This is Oracle's default configuration, though it can be changed.
When you see port 1532 listening on a server, it's almost certainly Oracle, not a 1990s modem driver.
Why This Happens
The registered ports range (1024-49151) works differently than well-known ports (0-1023). IANA accepts applications for port assignments, but there's no enforcement mechanism. Companies request ports, use them for a while, and sometimes move on. The registration stays in the database.
Other software vendors see an assigned-but-unused port and think "close enough." Oracle picked 1532 for Enterprise Manager. It works. The original registrant isn't using it. And so the port changes hands without the paperwork ever being updated.
This is normal. Port registrations age like phone book listings—accurate when printed, increasingly fictional over time.
The Registered Ports Range
Port 1532 sits in the middle of the registered ports range:
- Ports 0-1023: Well-known ports, assigned to core Internet services
- Ports 1024-49151: Registered ports, assigned by IANA on request (this is where port 1532 lives)
- Ports 49152-65535: Dynamic/ephemeral ports, never assigned, used temporarily
Registered ports are meant for specific applications, but the registration is more documentation than law. If you write software and want a port number, you can apply to IANA. They'll assign you one. But they won't stop someone else from using it if your software disappears.
How to Check What's Listening on Port 1532
On Linux or macOS:
On Windows:
If you see something listening on port 1532, it's probably Oracle Enterprise Manager Agent. Check the process name to confirm.
Why Unassigned and Reassigned Ports Matter
The port system only works because there are 65,535 options. Not every port needs to be permanently welded to one service forever. Old services die. New services need port numbers. The registered ports range is a living document, not a museum.
Port 1532 is a perfect example: officially assigned to hardware nobody uses, practically claimed by database monitoring that millions of systems depend on. The registration is outdated. The port is very much alive.
This is how the Internet grows: by reusing what came before.
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